OA41021: EZZ4321I ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION FOR DEVICE IUTSAMEH

A fix is available

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APAR status

  • Closed as unreproducible in next release.

Error description

  • When the EE XCA Major Node is activated some time after VTAM
    start, the following message is seen in TCP/IP:
      EZZ4321I ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION
      TO x.x.x.x FOR DEVICE IUTSAMEH.
    All EE XCA lines remain in PALNK status. Once hit, this
    condition is persistent. Enterprise Extender cannot be
    activated.
    

Local fix

  • Restart VTAM with EE XCA Major Node in ATCCONxx config list
    with at least one line ISTATUS=ACTIVE. This will allow the
    IUTSAMEH connection between VTAM and TCP/IP to be activated as
    required for Enterprise Extender functionality.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All using Enterprise Extender (EE).          *
    ****************************************************************
    * PROBLEM DESCRIPTION: Attempt to activate the EE XCA Major    *
    *                      Node yields the following TCP/IP        *
    *                      message:                                *
    *                                                              *
    *                          EZZ4321I ERROR: CODE=0810004A       *
    *                          DURING SETUP PHASE ON CONNECTION    *
    *                          TO  x.x.x.x FOR DEVICE IUTSAMEH.    *
    *                                                              *
    *                      All EE XCA lines remain in PALNK        *
    *                      status.                                 *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    With VTAM active, HPR is running and allocating TIPACs for
    packing buffers.  These TIPACs may be in the T100 or T200
    format.  As they are discarded via TSDSCARD/TSALERT, ISTTSCUD
    checks each buffer to determine if it might be an EE activation
    request.  ISTTSCUD looks in the PDUWA to do so.
    
    Because these TIPACs are not in the expected TI00 format, the
    field XBFL_PDUWA is actually pointing to an ISTSND block.
    ISTTSCUD references the ISTSND as though it were a PDUWA and
    falsely decrements the TSEXT EE count as a result, making the
    count go negative.
    
    Some time later, request to activate the EE XCA Major Node is
    issued.  Because the TSEXT EE count is not zero, the request
    fails. VTAM must be recycled to get EE to activate again.
    

Problem conclusion

Temporary fix

Comments

  • A currently unused bit in the base TSCB (TSCFIS) has been reused
    to indicate that the PDUWA has information that must be cleaned
    up during discard.  The new name is TSC_PDUWA_Cleanup.
    
    The new bit will be turned on and off as the PDUWA_EE_Setup or
    PDUWA_WUDInc indicator is turned on and off.  This will tell
    TSCB discard modules (ISTTSCUD, ISTTSCUC) whether or not it is
    safe to reference the PDUWA.
    
    All parts that set either PDUWA_EE_Setup or PDUWA_WUDInc have
    been changed to also set TSC_PDUWA_Cleanup accordingly.
    
      ISTTSCUC
      ISTTSCUD
      IUTLLCCS
      IUTLLCIO
      IUTLLCIX
    

APAR Information

  • APAR number

    OA41021

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    1D0

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-12-13

  • Closed date

    2013-01-04

  • Last modified date

    2013-03-04

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UA67638 UA67639

Modules/Macros

  • ISTTSCB  ISTTSCUC ISTTSCUD IUTLLCCS IUTLLCIO
    IUTLLCIX
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1C0 PSY UA67638

       UP13/02/09 P F302

  • R1D0 PSY UA67639

       UP13/02/09 P F302

Fix is available

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Document information


More support for:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

OA41021

Modified date:

2013-03-04

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